I used to write exclusively with one particular Montblanc fountain pen, although lately I have had to use a roller-tip fountain pen, because I find it harder and harder to control the fine muscles of my right hand during prolonged periods of work. I buy boxes of Deluxe Uni-ball pens, use them until they start to drag, and then change.
See, the 'On the Road' that came out in 1957 was censored. A lot of the honesty of it, the bitter honesty, is in the original scroll version that came out in 2007 on the 50-year anniversary. Back then, there was so much post-Second World War fear that was imposed on everybody - 'You must live life this way' - and these guys were bored.